Description of the double horizontal dial presented to the Royal Society by John Collins

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                                Houre Circle, you have ye time of her 
Southing, wch added to ye time found by 
ye moons shadow on ye Dyall, gives ye 
true time of ye Night.
Provided her Southing were well given,
wherein for Exactnes an Ephemerides may 
be used.
Of ye 2. square Tables of Figures.
The one is a generall Almanack described 
in ye Sector on a Quadrant pag. 12. latter 
part and reduced to a Verse in ye plained 
Scale new Plained page 
The other is a particular Table, shewing 
on what day of ye week ye first of March hap 
pens till ye year of 1700. and what ye Exact 
is for each year till then, and is described in 
yes<sup>d<\sup> Sector on a quadrant pag. 11 latter 
part.
Of ye Stars names about ye Projection.
To 12. of ye most eminent and convenient 
are affixt their right Adscensions, and these 
Stars being known, ye hour of ye night may 
be found by ym. To this purpose prepare a 
thred, w<sup>th<\sup> a loop at one end, wch will hitch 
upon ye further side of ye Cock to Pins 
heads for yt purpose, and stretching ye Thread 
over the Dyall standing in its true position,
                            
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Manuscript details

Author
John Collins
Reference
CLP/24/6
Series
Cl.P
Date
1667
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Description of the double horizontal dial presented to the Royal Society by John Collins, 1667. From The Royal Society, CLP/24/6

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